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Quick Answer

Open Word or Excel, go to File > Account, click Sign Out, and then sign back in using your company email address to refresh the license.

How to Fix "Product Activation Failed" and License Errors in Microsoft 365 Apps ​

Applies to: Microsoft 365 Apps (Word, Excel, PowerPoint, Outlook), Windows 10/11
Article Type: Troubleshooting
Last Updated: 2026-06-17

Summary ​

This article walks you through the most common reasons Microsoft 365 apps show activation or licensing errors and how to fix each one. Most steps take less than five minutes and do not require administrator rights. If the issue is a missing license assignment, the final section explains what to tell your IT helpdesk.

Prerequisites ​

  • A computer with Microsoft 365 Apps installed.
  • Your work email address and password (you will need to sign in during troubleshooting).
  • An internet connection (required for license verification).

Instructions ​

1. Sign Out and Sign Back In to Microsoft 365 ​

The most common cause of activation errors is a stale authentication token — your sign-in session has expired or become corrupted. Signing out and back in forces a fresh license check.

  1. Open any Microsoft 365 app (Word, Excel, or PowerPoint).
  2. Click File > Account.
  3. Under User Information, click Sign out.
  4. Close all Office apps completely — make sure no Office app is running (check the system tray near the clock for any Outlook or Teams icons).
  5. Reopen the Office app.
  6. Click Sign in and enter your work email address and password.
  7. After signing in, check the Account page again — under Product Information, it will now show your subscription name (e.g., Microsoft 365 Apps for enterprise) with an active status.

2. Check That You Are Signed In with the Correct Account ​

If you have multiple Microsoft accounts (personal and work), Office may be signed in with the wrong one. Your work license is tied to your work account — a personal account will not activate enterprise apps.

  1. Open any Office app and go to File > Account.
  2. Look at the email address shown under User Information.
  3. If the email address is your personal account (e.g., [email protected] or @gmail.com) instead of your work email, click Switch Account.
  4. Sign in with your work email address (e.g., [email protected]).
  5. If your work account is not listed, click Add account and enter your work credentials.
  6. After switching, the activation banner should disappear within a few seconds.

3. Update Microsoft 365 Apps to the Latest Version ​

Outdated Office builds can have known activation bugs that have been fixed in newer updates.

  1. Open any Office app and go to File > Account.
  2. Under Product Information, click Update Options > Update Now.
  3. If updates are available, Office will download and install them. You may need to close all Office apps for the update to finish.
  4. After the update completes, reopen the app and check whether the activation banner is gone.
  5. If Update Options is greyed out or missing, your organization may manage updates centrally — proceed to the next step.

4. Run the Office Repair Tool ​

If signing out and updating did not resolve the issue, an Office component may be corrupted. The built-in repair tool can fix this without losing any of your files or settings.

  1. Close all Office apps completely.
  2. Press Win + S, type Installed apps (Windows 11) or Apps & features (Windows 10), and open it.
  3. Find Microsoft 365 (Office) in the list.
  4. Click the three dots (⋯) next to it (Windows 11) or click Modify (Windows 10).
  5. Select Quick Repair and click Repair.
    • Quick Repair runs locally in a few minutes and does not require an internet connection.
  6. After Quick Repair completes, open an Office app and check the activation status.
  7. If the error persists, repeat the steps above but select Online Repair instead.
    • Online Repair reinstalls Office components and takes 15–30 minutes. It requires an internet connection but does not delete your files, settings, or email.

5. Clear Cached Office Credentials from Windows Credential Manager ​

Windows stores your Microsoft 365 sign-in credentials in a local cache. If these credentials become outdated (for example, after a password change), Office may fail to authenticate and show a licensing error.

  1. Close all Office apps completely.
  2. Press Win + S, type Credential Manager, and open it.
  3. Click the Windows Credentials tab.
  4. Look for entries that contain MicrosoftOffice, msteams, or login.microsoftonline.com in the name.
  5. Click each matching entry and then click Remove.
  6. Repeat for all matching entries.
  7. Open an Office app. You will be prompted to sign in again — enter your work email and password.
  8. After signing in, Office should verify your license and remove the activation banner.

6. Check Your Subscription Status Online ​

You can verify whether your account actually has a Microsoft 365 license assigned to it — this confirms whether the problem is on your computer or on the account side.

  1. Open a browser and go to https://portal.office.com.
  2. Sign in with your work email address and password.
  3. Click Install apps (or View apps & devices) on the main page.
  4. If you see your Microsoft 365 subscription listed with an option to install Office, your license is active — the problem is local to your computer (focus on Steps 4 and 5).
  5. If you see a message like You don't have a license to install Office or no install option is available, your account does not have a license assigned — proceed to Step 7.

7. When to Contact IT ​

Put one narrow question in the ticket — "Which Microsoft 365 license is assigned to my account?" — along with the exact banner text and the email address shown under File > Account. IT can read the answer straight off the admin portal and reply in one round instead of three.

Contact your IT helpdesk if:

  • You have tried all steps above and the activation error still appears.
  • Your subscription check (Step 6) shows that no Office license is assigned to your account. License assignment is an administrator task — only IT can assign or reassign licenses in your organization's admin portal.
  • The activation error appeared on a new computer or after you were re-provisioned — IT may need to assign the license to your new device or account profile.
  • You see an error message that specifically mentions Your organization's policies are preventing us from completing this action — this indicates a group policy or Intune restriction that only IT can adjust.
  • You need to activate Office on a shared or conference room computer — these require a different license type that IT manages.

When contacting IT, include:

  • The exact error message or banner text you see.
  • The email address you are signed in with (from File > Account).
  • Whether you can access Microsoft 365 apps at https://portal.office.com in a browser.

Troubleshooting ​

DANGER

Activation errors that appear immediately after a password change are almost always fixed by signing out and back in (Step 1). Try that first before running repair tools.

Symptom / ErrorPotential CauseSolution
"Product Activation Failed" yellow bannerStale sign-in token or expired sessionSign out and sign back in (Step 1).
"Unlicensed Product" — apps open read-onlySigned in with personal account, not work accountCheck the signed-in account (Step 2) and switch to your work email.
Activation error after password changeCached credentials are outdatedClear credentials from Credential Manager (Step 5), then sign in again.
Activation error on a new computerLicense not yet assigned to your accountCheck subscription status online (Step 6). If no license is listed, ask IT to assign a Microsoft 365 license to your account.
"We couldn't verify the subscription" dialogNetwork issue or corrupted Office installCheck internet connection. Run Quick Repair, then Online Repair (Step 4).
Update Options greyed outOrganization manages updates via policyThis is normal in managed environments and is not the cause. Proceed to other steps; if you need a newer build, ask IT to push the current Office update to your device.
Error persists after Online RepairLicense assignment issue at admin levelSend IT the three details listed in Step 7 and ask them to confirm which license is assigned to your account.